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Subtract 20/84 from 10/15

10/15 - 20/84 is 3/7.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 15 and 84 is 420
  2. For the 1st fraction, since 15 × 28 = 420,
    10/15 = 10 × 28/15 × 28 = 280/420
  3. Likewise, for the 2nd fraction, since 84 × 5 = 420,
    20/84 = 20 × 5/84 × 5 = 100/420
  4. Subtract the two fractions:
    280/420 - 100/420 = 280 - 100/420 = 180/420
  5. After reducing the fraction, the answer is 3/7

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